Watch: the CureRays® explainer series
Prefer to read? The full guide below is complete on its own, with tables you can revisit any time.
What is lymphoepithelial carcinoma?
Lymphoepithelial carcinoma is a rare cancer made of poorly differentiated (immature-looking) cancer cells intimately mixed with a heavy infiltrate of immune cells (lymphocytes) — an appearance identical to the most common cancer of the nasopharynx (the space behind the nose). When it arises outside the nasopharynx, it is called lymphoepithelial carcinoma or 'lymphoepithelioma-like carcinoma,' and it can occur in the salivary glands, tonsils, larynx, lung, stomach, skin, bladder, and other sites. Many cases — especially in the head and neck — are associated with the Epstein-Barr virus (EBV), the same virus tied to nasopharyngeal cancer; in some organs and populations it is not EBV-related. A key feature is that, like its nasopharyngeal counterpart, it is usually very sensitive to radiation and chemotherapy. Because of this, treatment often centers on radiation (frequently combined with chemotherapy) rather than extensive surgery, and outcomes are often better than the immature appearance of the cells might suggest.
The main types
Doctors group lymphoepithelial carcinoma by where it starts and how it behaves:
| Type | What it means, simply |
|---|---|
| Head and neck (salivary, tonsil, larynx) | Often EBV-associated; behaves much like nasopharyngeal cancer and responds well to radiation with chemotherapy. |
| Lung (lymphoepithelial-like carcinoma) | A distinct lung cancer subtype, EBV-associated mainly in Asian populations, generally with a more favorable outlook than other lung cancers; treated by stage with surgery, radiation, and chemotherapy. |
| Other sites (stomach, bladder, skin) | Can arise in many organs; EBV link varies by site, and treatment follows the principles for cancer in that organ, taking advantage of its radiation sensitivity. |
Staging, in plain terms
Lymphoepithelial carcinoma is staged with the TNM system for whichever organ it starts in (for example, head-and-neck or lung staging): T for the size or extent of the tumor, N for lymph node spread (common in this cancer), and M for distant spread. Because it spreads to lymph nodes readily but responds well to treatment, node involvement does not carry the same poor outlook it would in many other cancers.
| TNM staging by site of origin | What it generally means |
|---|---|
| Stage I–II | A localized tumor with little or no lymph node involvement. Often highly curable, frequently with radiation alone or radiation plus chemotherapy. |
| Stage III | Larger tumors or spread to regional lymph nodes — common in this cancer. Usually treated with combined chemotherapy and radiation. |
| Stage IV | Extensive local spread or distant metastases. Treated with chemotherapy, radiation, and increasingly immunotherapy; outcomes are often better than for other cancers at the same stage. |
The standard of care
Lymphoepithelial Carcinoma is almost always treated by a team that may include a surgeon, a medical oncologist, and a radiation oncologist, combining therapies for the best result. The usual building blocks are:
Radiation therapy
Because the tumor is very radiation-sensitive, radiation is the central treatment for head-and-neck and many other sites, often curing the cancer while preserving the organ.
Concurrent chemoradiation
For larger or node-positive tumors, chemotherapy given with radiation improves cure rates — mirroring the proven approach for nasopharyngeal cancer.
Surgery (selected sites)
Surgery is the primary treatment for some sites such as early lung or skin tumors; in the head and neck, it is used less often because radiation works so well.
Immunotherapy and EBV-directed approaches
For advanced or recurrent disease, immune checkpoint inhibitors and EBV-targeted strategies are increasingly used, taking advantage of the tumor's immune-rich environment.
How radiation treatment works
Radiation damages the DNA inside cancer cells so they can no longer divide and survive, while healthy cells repair themselves more effectively. Lymphoepithelial carcinoma is unusually sensitive to radiation, which means radiation — often combined with chemotherapy — can frequently cure the cancer while preserving the affected organ and avoiding major surgery. Treatment is delivered as a series of short, painless daily sessions, uses no radioactive implants, and leaves no radioactivity in your body, so you remain safe to be around family and children throughout.
The main ways radiation is delivered for lymphoepithelial carcinoma:
Intensity-modulated radiation therapy (IMRT)
Computer-shaped beams deliver a high, curative dose to the tumor and at-risk lymph nodes while sparing nearby organs such as salivary glands, the spinal cord, and the optic nerves.
Proton therapy
Proton beams stop at the tumor and deliver little dose beyond it, useful for tumors near the eyes, brain, or other sensitive structures, especially in the head and neck.
Concurrent chemoradiation
Radiation delivered alongside chemotherapy that sensitizes the cancer cells, increasing the chance of cure for node-positive disease.
Latest studies shaping care
Care keeps improving — often toward getting the same excellent results with less burden on patients. A few developments:
Treated on the nasopharyngeal model: Reviews support managing head-and-neck lymphoepithelial carcinoma like nasopharyngeal cancer — with radiation and concurrent chemotherapy — given their shared biology and excellent radiation sensitivity.[1]
Head and neck oncology reviews (2021–2024)
Favorable outlook in lung subtype: Studies report that lymphoepithelial-like carcinoma of the lung generally carries a better prognosis than other non-small-cell lung cancers, with EBV positivity common in endemic regions.[2]
Thoracic oncology series (2022–2025)
Immunotherapy for advanced disease: The immune-rich, often EBV-driven nature of these tumors has made immune checkpoint inhibitors and EBV-targeted approaches promising options in recurrent or metastatic disease.[3]
Translational immuno-oncology studies (2023–2025)
Common questions
Is this the same as nasopharyngeal cancer? It looks the same under the microscope and behaves very similarly, but 'lymphoepithelial carcinoma' usually refers to this tumor when it arises outside the nasopharynx — for example in a salivary gland, the tonsil, or the lung. The shared biology means it responds to the same radiation-based treatments.
Why is the Epstein-Barr virus mentioned? Many of these cancers, especially in the head and neck, are linked to the Epstein-Barr virus, which is present in much of the population. The virus helps drive the tumor and can sometimes be used to monitor treatment, but it does not mean the cancer is contagious.
Why radiation instead of surgery? These tumors are unusually sensitive to radiation, so radiation — often with chemotherapy — can cure many of them while preserving the affected organ. Surgery is still the main treatment for some sites, but for head-and-neck disease, radiation is usually preferred.
References
Numbered sources for the studies cited above. Links open the primary publication on PubMed or the publisher’s site.